The cause of bleeding after taking the pill should be considered according to the patient’s condition, specifically the following: 1. If the patient has bleeding after taking the pill, it is not a side effect caused by the pill, but may be caused by damage to the vaginal mucosa during intercourse. 2. It may be caused by vaginitis, pelvic inflammatory disease, etc. It is recommended that the patient go to the hospital in time and have the cause checked. 4. Vaginal bleeding about 1 week after taking the pill is a normal phenomenon because the progesterone in the body rises after taking the pill and suddenly drops 1 week after taking the pill. This situation does not require treatment, but if the bleeding time is too long over 1 week, you need to consult a doctor and do the corresponding treatment.